Resolution Enhancement by Variable Zoom Trajectory in X-Ray Computed Tomography

Flat objects like electronic boards are challenging samples for high-resolution X-ray computed tomography scanning because their largest dimension significantly limits the magnification using circular trajectory scans. One way to improve spatial resolution for such samples is to utilize variable zoo...

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Bibliographic Details
Published inJournal of nondestructive evaluation Vol. 43; no. 3
Main Authors Blažek, Pavel, Suppes, Alexander, Wolfschläger, Dominik, Zikmund, Tomáš, Kaiser, Jozef, Schmitt, Robert H.
Format Journal Article
LanguageEnglish
Published New York Springer US 01.09.2024
Springer Nature B.V
Subjects
Algorithms
Characterization and Evaluation of Materials
Classical Mechanics
Computed tomography
Control
Dynamical Systems
Engineering
Solid Mechanics
Spatial resolution
Vibration
Trajectory
X-ray computed tomography
Variable zoom
MTF
Resolution
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Summary:Flat objects like electronic boards are challenging samples for high-resolution X-ray computed tomography scanning because their largest dimension significantly limits the magnification using circular trajectory scans. One way to improve spatial resolution for such samples is to utilize variable zoom trajectory. During variable zoom trajectory scanning, the source-to-object distance changes during the 360° rotation to maximize the magnification in the projections. Here, we propose an automatic variable zoom trajectory generation algorithm for arbitrary object and region of interest (ROI). We analyze how such a trajectory can enhance resolution in different cases and how isotropic is the resolution in the reconstructed volume. We demonstrate that the resolution can be improved without destroying the sample. However, the improvement is manifested mainly in directions in which we achieved the highest magnification in the projection.
ISSN:0195-9298
1573-4862
DOI:10.1007/s10921-024-01093-6